Cylindrical filter element



FIG. 1 is a front view of a cylindrical filter element showing our design with all other side views being identical; and,

FIG. 2 is a cross sectional view taken in the direction of line 2--2 of FIG. 1.

The broken line illustration in FIG. 1 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a cylindrical filter element, as shown and described. 